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System and method for capturing and decontaminating photoplethysmopgraphy (PPG) signals in a vehicle

Active Publication Date: 2015-08-13
HONDA MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a system and method for processing photoplethysmography (PPG) signals in a vehicle. The system includes an optical sensor for receiving a PPG waveform signal, a processing module for processing the PPG measurement signal based on the waveform signal, and a motion artifacts detection module for receiving a noise waveform signal from sensors such as a seat assembly, vehicle, or vehicle system. The motion artifacts detection module filters out the noise waveform signal to produce a refined PPG signal that is free of motion artifacts. This results in a more accurate measurement of the driver's pulse rate.

Problems solved by technology

However, PPG readings are susceptible to contamination by noise in the form of motion artifacts that can impact the usefulness of PPG data for biometric interpretation.

Method used

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  • System and method for capturing and decontaminating photoplethysmopgraphy (PPG) signals in a vehicle
  • System and method for capturing and decontaminating photoplethysmopgraphy (PPG) signals in a vehicle
  • System and method for capturing and decontaminating photoplethysmopgraphy (PPG) signals in a vehicle

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Embodiment Construction

[0011]The following includes definitions of selected terms employed herein. The definitions include various examples and / or forms of components that fall within the scope of a term and that can be used for implementation. The examples are not intended to be limiting.

[0012]A “bus”, as used herein, refers to an interconnected architecture that is operably connected to other computer components inside a computer or between computers. The bus can transfer data between the computer components. The bus can be a memory bus, a memory controller, a peripheral bus, an external bus, a crossbar switch, and / or a local bus, among others. The bus can also be a vehicle bus that interconnects components inside a vehicle using protocols such as Media Oriented Systems Transport (MOST), Controller Area network (CAN), Local Interconnect Network (LIN), among others.

[0013]“Computer communication”, as used herein, refers to a communication between two or more computing devices (e.g., computer, personal dig...

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Abstract

A system and method for processing photoplethysmography (PPG) signals in a vehicle. The system and method include receiving a PPG waveform signal from an optical sensor. The system and method also include processing a PPG measurement signal based on the PPG waveform signal. The system and method additionally include receiving a noise waveform signal from at least one of: a seat assembly sensor, a vehicle sensor, and a vehicle system. Additionally, the system and method include processing a motion artifacts measurement signal based on the noise waveform signal. The system and method further include processing a refined PPG signal to suppress the motion artifacts measurement signal from the PPG measurement signal.

Description

[0001]The application is a continuation-in-part of, and claims priority to U.S. application Ser. No. 13 / 858,038, filed on Apr. 6, 2013, the entire application of which is incorporated herein by reference.BACKGROUND[0002]Photoplethysmography (PPG) provides a non invasive optical technique to detect changes in blood volume and blood composition in a biological being. However, PPG readings are susceptible to contamination by noise in the form of motion artifacts that can impact the usefulness of PPG data for biometric interpretation. Specifically, within a vehicle environment, motion artifacts can be enhanced based on noise, road vibration, individual movement, vehicle movement, inertial movement, among others. Motion artifacts become an exceptional property of captured PPG signals that pollute PPG readings and provide a skewed biometric interpretation.BRIEF DESCRIPTION[0003]According to one aspect, a computer implemented method for processing photoplethysmography (PPG) signals in a ve...

Claims

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Application Information

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IPC IPC(8): H04B1/10A61B5/00A61B5/18
CPCH04B1/10A61B5/7207A61B5/0059A61B5/18B60R25/25G06V40/15G06F2218/10G06F2218/12
Inventor FUNG, KIN C.DICK, TIMOTHY J.
Owner HONDA MOTOR CO LTD
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